For those of you out there riding steel frames, particularly old conversions....how much life do you expect to get outta your frame? I'm just wondering, because I've cracked every steel frame I've ever owned. Most of these have been steel BMX frames, but recently I cracked my Bianchi fixed gear conversion frame after about 2000 miles. The BB shell developed an inch-long crack. Now I'm using an old Motobecane frame (a real one, not the new fake Motobecane USA). I like these old road frames because they take fenders and big tires and such and most of my fixed gear riding is commuting. I'm guessing that a lot of these older frames just aren't built to withstand the abuse that they get with a fixed gear. If my Motobecane cracks, I'm gonna just get a legitimate track frame.